1
22
23 package com.liferay.util;
24
25 import com.liferay.portal.kernel.log.Log;
26 import com.liferay.portal.kernel.log.LogFactoryUtil;
27
28 import java.lang.reflect.InvocationTargetException;
29
30 import java.util.Comparator;
31
32 import org.apache.commons.beanutils.PropertyUtils;
33
34
40 public class PropertyComparator implements Comparator {
41
42 public PropertyComparator(String propertyName) {
43 this(new String[] {propertyName}, true, false);
44 }
45
46 public PropertyComparator(String[] propertyNames) {
47 this(propertyNames, true, false);
48 }
49
50 public PropertyComparator(
51 String propertyName, boolean asc, boolean caseSensitive) {
52
53 this(new String[] {propertyName}, asc, caseSensitive);
54 }
55
56 public PropertyComparator(
57 String[] propertyNames, boolean asc, boolean caseSensitive) {
58
59 _propertyNames = propertyNames;
60 _asc = asc;
61 _caseSensitive = caseSensitive;
62 }
63
64 public int compare(Object obj1, Object obj2) {
65 try {
66 for (String propertyName : _propertyNames) {
67 Object property1 = PropertyUtils.getProperty(
68 obj1, propertyName);
69 Object property2 = PropertyUtils.getProperty(
70 obj2, propertyName);
71
72 if (!_asc) {
73 Object temp = property1;
74
75 property1 = property2;
76 property2 = temp;
77 }
78
79 if (property1 instanceof String) {
80 int result = 0;
81
82 if (_caseSensitive) {
83 result = property1.toString().compareTo(
84 property2.toString());
85 }
86 else {
87 result = property1.toString().compareToIgnoreCase(
88 property2.toString());
89 }
90
91 if (result != 0) {
92 return result;
93 }
94 }
95
96 if (property1 instanceof Comparable) {
97 int result = ((Comparable)property1).compareTo(property2);
98
99 if (result != 0) {
100 return result;
101 }
102 }
103 }
104 }
105 catch (IllegalAccessException iae) {
106 _log.error(iae.getMessage());
107 }
108 catch (InvocationTargetException ite) {
109 _log.error(ite.getMessage());
110 }
111 catch (NoSuchMethodException nsme) {
112 _log.error(nsme.getMessage());
113 }
114
115 return -1;
116 }
117
118 private static Log _log = LogFactoryUtil.getLog(PropertyComparator.class);
119
120 private String[] _propertyNames;
121 private boolean _asc;
122 private boolean _caseSensitive;
123
124 }